Mixing unit for gases.



F. G. CRONE.

MIXING UNIT FOR GASES.

APPLICATION FILED APR.22.1914.

1,205,436. l Patented NOV. 21, 1916.

MIXING UNIT non GASES.

Specification of Letters Patent.

Application led April 22, 1914. Serial No..833,650.

T all whom it may concern Be it known that I, FRANCIS G. CRONE, acitizen of the United States of America, and a resident of the city ofBuffalo, county `of Erie, and State of New York, have invented certainnew and useful Improvements in Mixing Units for Gases, of which thefollowing is a full, clear, and exact description.

My invention relates generally to mixing units, and has for itsprincipal object to provide a device which will more thoroughly mix thefuel and air and thus produce a more perfect combustion.

Another object of my invention has been to provide a device which may beused in connection with gas burners to improve the combustion and toprevent back firing.

My device comprises a plurality of members so formed and arranged as toprovide a plurality of passage ways through which the products ofcombustion are passed. By passing the products of combustion throughthese passage ways, the burning point is some distance from the mixingchamber and thus back tiring of the Haine is effectively prevented.

Reference is to be had to the accompanying drawings, forming part ofthis specilication, in which like characters of reference indicate likeparts throughout the several views, of which: v

Figure 1 is a perspective view of a rectangular-shaped unit, composed ofa number of members disposed one above the other. Fig. 2 is a plan viewof a. unit formed of circularly-shaped rings instead of fiat plates.Fig. 3 is a sectional view of the same and is taken on line 3 3 of Fig.2. Fig. 4 is a front elevation of a sector-shaped furnace gas burnerembodying my invention. Fig. 5 is a plan view of the same, partly brokenaway. Fig. 6 is a front elevation of a modified form of unit. Fig. 7 isa sectional elevation taken through the center line of a furnace whichhas been provided with burners embodying my invention. is a plan view ofaburner in which the circularly-shaped units are used.

My vdevice comprises units 10, which are preferably formed of castmaterial. and are each provided on one surface wit-h a pluralitv ofcorrugations or grooves l1 and on the opposite side with a smooth, flatsurface. In the circularly-shaped unit shown in Figs. 2 and 3, themembers l0 are made in Fig. 8-

the form of rings with the corrugations or grooves 11 formed on theouterl circumfer- 'ence and with the smooth surface on the innercircumference. These rings are preferably cast with tapered surfaces sothat they may be easily assembled and when so assembled, are disposedone within the other.

In the gas burner shown in Figs. 4 and 5, the bottom of the burner box12 is preferably provided. with a' plurality of corrugations or grooves13, so that when theunits l0 are placed within'the box, the smoothsurface of the lower unit will contact with the ridges on the bottom ofthe box and form an additional number of passage ways. After the members10 have been placed in the box, a cover 14 is placed over the top andbolts 15 pass through the cover 14, members 10 and bottom of the box,thus securely holding the burner parts together. The box 12 is thusclosed on all sides, except the face of the same where combustionoccurs. The cover 1l is provided at each end with Patented Nov. 21,1916.

a 1spacing rib 16, which acts to keep thev burner at a proper distancefrom the lirepot when placed in 'the furnace, as clearly shown in Fig.7. The burner cover is also provided with a screw-threaded aperture bywhich the mixing pipe 17 may be attached to the burner. The bottom ofthe box 12 is also provided with a screw-threaded aper- Vture directlybeneath the screw-threaded aperture in the cover 14 byl means of whichthe mixture may' be fed to the burner from the upper surface or thelower surface, as conditions may require. Obviously, when the mixingpipe 17 is attached to the cover 14 of the burner, the aperture in thelower side of the. box 12 is closedby means of a plug. The members 10are placed flush with the front surface of the burner and do not extendback to the rear side of the box, thus providing a chamber 1S in whichthe mixture enters before it passes out from the plurality of passageways formed by the ,members 10. As shown in Fig. 7, preferably four ofthese burners are used in the furnace, and each is provided with aseparate mixing pipe 17, air mixers 28 and gas valves 19. These valves19supply gas to the mixers from the gas pipe 20. As shown in this figure,the mixing pipes 17 are passed through the coal feeding opening 21 ofthe furnace and thence down to the burners. If, however, localconditions'do not permit these pipes to be arranged in this manner, theymay be passed through the ash opening 22 and connected to the lovverside`of the gas burners.

In Fig. G, I shovv a modified form of unit vWhere alternate corrugatedand smooth members are used. In this figure, the members 23 are providedwith corrugations or grooves '2l on opposite sides, and when arranged ina unit a Hat member is alternately disposed between ,the corrugatedtures, in each of which is arranged one of the circularly-sliaped unitsshovvnin Figs. 2 and 3.

Cbviously, if desired, the ring units shown. in Figs. 2 and 3, may beprovided with the corrugations on the inner surface instead of theouter, or my units may be made in different shapes to conform to localconditions. These and man)v other modifications of the details hereinshown and described may be made Without departing from the spirit .of f

my invention or the scope of the appended claim.

Having thus described my invention, what I claim is: s

.A mixingunit for gases comprising, a solid, annularly tapered centralmember having an external corrugated surface, an nnular member having asmooth, tapered, interior surface and a tapered, exterior, corrugatedsurfacedisposed around and in Contact with said central member, and anannular, exterior member having a tapered, Smooth, innersurface and acorrugated outer surface, said annular, exterior member being` disposedaround said annular member and in contactivit-h the corrugationsthereof.

In testimony vvhereof, I have hereunto signed my name in the presence oftivo subscribing witnesses.

FRANCIS G. CROXE. fitnesses a J. WM. ELLIS, WALTER H. KELLEY.

